Printing machine



Aug. 11, 1925.

" H. H. SULLIVAN PRINTING MACHINE Filed Oct. 8, 1921 2 Sheets-Sheet 1 ATTORNEY Aug. 11, 1925 1,549,034

- H. H, SULLIVAN PRINTING MACHINE Filed Oct, 8, 1921 2 Sheets-Sheet 2 z I k/fi l o m I I if a 24 31 l W E I iNVENTOR *5/14 ATTORNEYS Patented Aug. 11, 1925.

UNITED STATES HARRY HEWES SULLIVAN, OF ROCHESTER, NEVJ YORK.

PRINTING MACHINE.

Application filed Octcber 8, 1921. Serial No. 506,290.

To aZZ whom it may concern:

Be it known that I, HARRY Hnwns SULLI- VAN, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Printing Machines, of which the following is a specification.

The present invention relates to printing machines and more particularly to the type having a curved glass or transparent bed over which a negative and sensitized ii'iaterial are caused to travel, an illuminating means being arranged on the concave side of the bed for exposing the sensitized material with a negative to a strong light. An object of this invention is to provide a means for cooling the transparent or glass bed more effectively than has been heretofore possible. Another object of the invention is to provide a deflector against which the cooling blast will in" inge to be deflect-- ed away from the adjacent globe of the illuminating means onto the curved bed near one end of the latter in such a manner that the cold blast is caused to travel over the entire surface of the bed.

To these and other ends the invention consists of certain parts and combinations of parts, all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the drawings:

Fig. 1 is a side view of a printing machine constructed in accordance with this inven tion;

Fig. 2 is a fragmentary section showing the arrangement of the deflector in the ma chine;

Fig. 3 is a view of that face of the deflector disposed away from the fan; and

Fig. 4 is a section on the line H, Fig. 3.

The printing machine herein illustrated is of a known type comprising side frames 1 connected by a transparent curved bed 2, the concave fac of which is disposed upwardly and the cross section of the bed being substantially U shaped. Means such as a belt or endless conveyor 3 shown in dotted lines in Fig. 1, causes the sensitized material such as blue print paper with tracing or other negative to travel from the table l to a receiving receptacle 5 over the under side of the transparent or glass bed 2. The speed of this travel is preferably controlled through a lever 6 which is pivoted at Y and connects by link 8 with a lever 9 the latter in turn being pivoted at 10 and having connection with an axially moving shaft 11 which carries a friction disk 12, engaging with a friction disk 13 on a shaft of a motor 1 1. ()n the shaft 11 a worm 15 is arranged, which meshes with a worm wheel 16 on one of the rollers 17 about which the endless conveyor 3 passes. These parts are not shown fully as they are of well-known construction.

In order to expose the sensitized materiai to a strong light an illun'iinating means or light source is provided preferably in a form of a plurality of arc lamps 22 arranged as in well-known manner, not fully shown, in a series extending transversely of the direction of the travel of the conveyor and above the concave face of the bed. Each of these are lamps is enclosed by a globe 23. These lamps while in operation produce heat which, while essential. to efficient lighting, is detrimental in the making of certain kinds of prints and must be prevented to some extent from reaching the printing bed of the machine, and for this purpose a bed rooling means is provided. I

The bed cooling means produces a blast of air transversely of the travel of the con-- veyor 3, and in this instance, one of the side frames 1 has a fan-housing 18 secured thereto and having mounted therein a rotary fan 19 which may be supported on the shaft of an electric motor 20, the latter being arranged exteriorly of the housing 18 on a bracket 21 which projects laterally from the housing 18. It is apparent that with this construction the rotation of the fan through the motor 20 creates a blast above the bed 2 transversely of the line of travel of the conveyor. If the fan directs its blast upon the globes 23, it will be found that the globe nearest the fan is slightly cooler than those farther removed. All globes must be maintained in an approximately even temperature in order to insure uniform lighting. Furthermore, if the fan directs its blast upon the globes 23, the bed 2 does not re ceive a proper cooling action and, in fact the end farthest removed from the blast will not be materially affected.

With the object in view of even distribution of the blast over the entire surface of the printing bed, thereby obtaining uniform temperature, and of preventing the blast from reaching the gloljies 233, there is associated with the bed cooling nroduc'ng means a distributing means which, in this ii stance, is in the form of a deflector arranged in front of the fan 19 so as to direct said blast in the form of an are against the bed while causing the blast to travel over the surface of the bed transversely of the line of movenient of the sensitized material over such bed. In this illustrated embodiment this deflector is in the form of a plate 2 the upper edge of Which is turned inwardly at 24: toward the blast producing means or fan 19, said edge being provided with lugs 24; which may be secured by bolts & to the housing 18 at the open side of the latter. sid and hoti110 tom edges of this deflector are turned at 24 outwardly in the direction of the travel of the blast, said side and bottom edges eon forming substantially to the curvature of the concave side of the bed and being spaced from said bed so that there is provided about the deflector a passageway conforming substantially to the curvature concave face of the bed. It is apparent that with this arrangement the greater portion of the blast travels over the concave fare of the bed thus maintaining such bed in a uniformly cool state.

This manner of controlling the blast so that there results an effective cooling of the bed substantially throughout its entire area is believed to be new and novel. The means by which this is accomplished is simple and ine:-;pensive to manufacture and is not liable to get out of order.

hat I claim as my invention and desire to secure by Letters Patent is:

1. The combination with a curved glass bed, means for causing the travel of a sensitized sheet over the convex face of the bed, illuminating means arranged on the concave side of the bed, and means for creating an air blast at one side of the bed above the concave face, of a deflector arranged be tween the illuminating means and the blast creating means, and above said concave face in spaced relation to the latter, the edge of the deflector conforming sul'istantiz lly to the concave face of the bed.

The cznixbination with a curved glass bed, a series of electric lights arranged to ilhuninate the concave face of the bed, and a fan arranged at one side of the bed, of a deflector arranged between the blast producing means and the electric lights and having an edge formed to cause the blast to issue in a curved stream over the concave face of such bed.

The combination with a frame, a curved glass bed supported by said frame with its concave face disposed uppermost, a series of electric lights provided with globes arranged above the curved face to illuminate such face, a fan housing for distributing the blast over the concave face of said bed, of a deflector secured at its upper edge, depending in front of said fan, and having an edge conforming substantially to said concave face.

i. The combinazition with a curved bed, illuminating means for the bed, and blast producing means arranged at one side of the ed to throw a blast over the concave face of the bed, of a deflector having its upper edge turned toward the blast and its side and bottom edges deflected away froi'u the blast and conforming substantially to the concave face of the bed, said edges being spaced from the concave face to produce a stream conforming substantially to the cur vature of the concave face of the bed.

5. The combination with a curved bed, illuminating means for the bed, and blast producing means arranged at one side of: the bed to throw a blast over the concave face of the bed, of a deflector interposed between the blast producing means and the illuminating means for protecting the latter from the blast, said deflector having its upper edge turned toward the blast and its side and bottom edges deflected away from the blast, the said side and bottom edges being spaced from the concave face to produce a stream conforming substantially to the curvature of the concave face of the bed.

HARRY HEWVES SULLIVAN.

lit) 

